EP0045212B1 - Wärmeschrumpfbarer Artikel und Verfahren zu dessen Herstellung - Google Patents

Wärmeschrumpfbarer Artikel und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0045212B1
EP0045212B1 EP81303442A EP81303442A EP0045212B1 EP 0045212 B1 EP0045212 B1 EP 0045212B1 EP 81303442 A EP81303442 A EP 81303442A EP 81303442 A EP81303442 A EP 81303442A EP 0045212 B1 EP0045212 B1 EP 0045212B1
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EP
European Patent Office
Prior art keywords
substrate
recoverable
heat
process according
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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EP81303442A
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English (en)
French (fr)
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EP0045212A3 (en
EP0045212A2 (de
Inventor
Pushpkumar Changani
Donald George Peacock
David Roberts
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Raychem Ltd
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Raychem Ltd
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Publication date
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Priority to AT81303442T priority Critical patent/ATE7184T1/de
Publication of EP0045212A2 publication Critical patent/EP0045212A2/de
Publication of EP0045212A3 publication Critical patent/EP0045212A3/en
Application granted granted Critical
Publication of EP0045212B1 publication Critical patent/EP0045212B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
    • F16L47/22—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics using shrink-down material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • H01R4/723—Making a soldered electrical connection simultaneously with the heat shrinking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
    • B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes

Definitions

  • the present invention concerns hollow heat-recoverable polymeric articles, the dimensional configuration of which may be made to change by subjecting to heat, and in particular, to such articles provided with a functional insert such as an adhesive, sealant, electrically conductive or semi-conductive material or solder insert and to a process for the manufacture of such articles.
  • a functional insert such as an adhesive, sealant, electrically conductive or semi-conductive material or solder insert
  • hollow heat-recoverable articles have generally been produced by forming a polymer into the desired heat stable configuration, (e. g. by moulding or extrusion, or by seam welding of polymer sheets), simultaneously or subsequently cross-linking the polymer in its heat stable configuration, heating the article to a temperature above the crystalline melting point or softening point of the cross-linked polymer, deforming the article and cooling the article whilst in the deformed state so that the deformed configuration is retained.
  • Examples of such known techniques using seam welding followed by hot deformation may be found in FR-A-2444392 and FR-A-2114005.
  • application of heat will cause the article to revert or tend to revert to its original heat stable configuration.
  • the hollow articles are of such configuration that they cannot be produced directly by extrusion, for example electrical boots, udders (a term employed herein in a general sense to cover any hollow heat shrinkable article comprising at least three outlets employed in the termination of electrical cables and also commonly referred to as cable «breakouts») or end-caps (a hollow tubular article having a smoothly tapering sealed end) for electric cables, and hitherto such articles have generally been formed into the desired heat stable configuration on an item-by-item basis by moulding, e.g. by injection, compression or transfer moulding techniques. Quite apart from the added expense of such techniques, for complicated shapes, e.g.
  • the present invention provides a process for the production of a hollow heat-recoverable article provided with a functional insert which comprises
  • Another aspect of the present invention provides a process for the production of a hollow heat-recoverable article provided with a functional insert which comprises
  • the bonding of the body and substrate may be achieved via further bonding material in addition to the body and substrate, which further material is cross-linked with that of the body and substrate.
  • the bonding is effected by fusion of the said polymeric material, preferably in direct contact of the body with the substrate.
  • fusion bonding as employed herein is meant a process wherein the material in the parts to be bonded together is caused to flow to form the bond, e.g. welding by heat, solvent or ultrasonic or radio frequency energy, preferably with the application of pressure, either to form a homogeneous bridge between the parts in the absence of any discernible interface therebetween or to fuse the parts with further material which is cross-linked with the material of the said parts by the cross-linking step of the process.
  • the bonding (preferably fusion) step may be effected either before or after the deformation step, preferably however after the deformation step. Bonding before deformation produces the configuration of the article before it is rendered heat recovereable, and care must be taken not to break the bond or lose the insert during the subsequent deformation.
  • references to «hollow» articles include articles in a flat state which can be opened to reveal their hollow interior
  • references to «tubular» articles include multi- legged, tapering, or irregular articles of a generally elongate hollow form, and these terms may refer to articles only part of which is hollow or tubular as aforesaid.
  • the process is applicable to both crystalline and non-crystalline polymers, the softening point (by which is meant the crystalline melting point for crystalline polymers) being selected accordingly as the maximum deformation temperature.
  • fusion bondable polymeric materials and substrates as employed herein is meant not cross-linked to the extent that the material cannot be readily bonded to itself or to another polymeric component by fusing.
  • the level of cross-linking in the polymeric material expressed in terms of gel content is preferably less than 40%, more preferably less than 20%, particularly less than 5%.
  • gel contents of at least 40%, e.g. at least 50%, particularly at least 65% are attained.
  • the cross-linking cross-links substantially all of the polymeric material in addition to the bond-forming material.
  • Cross-linking is preferably performed after the deforming and bonding steps, but could be effected after the deformation step and during the bonding step.
  • the said substrate to which part of the said body is bonded is another part of the said body, in which case the body may be in the form of a web which is expanded longitudinally by the deformation step.
  • the said substrate to which part of the said body is bonded is initially separate from the said body, in which case both the body and the substrate may be in the form of a web and both may be longitudinally expanded by the deformation step.
  • the process may be performed so as to provide a plurality of separable hollow heat-recoverable articles each having a functional insert located therein with cross-linking effected before or after separating the articles.
  • the deforming step locally deforms at least one substantial region of the said body, the said substrate is locally deformed in at least one substantial region at a temperature below the softening point of the material to render it heat recoverable, and the body is bonded to the substrate with their respective deformed regions co-operating with each other to produce hollow said article(s).
  • Vacuum forming of a web of polymeric material is the preferred method of performing the localised deformation.
  • Hollow heat-recoverable articles produced by the process of the invention also form part of the present invention.
  • One advantage of the articles of the invention is that they are substantially recoverable, e.g. to at least 50% of their maximum extent, at a temperature below the crystalline melting point or softening point of the polymeric material from which they have been produced, e.g. in the range 60 °C to the crystalline melting point or softening point.
  • the process is particularly useful in the manufacture of heat-recoverable boots, transitions, solder connector sleeves, udders and end-caps for electrical applications, e.g. electrical cables, the use of such products being extensive and well reported in the literature e.g. Proc. IEE 1970j, 117(7), 1365-1372.
  • Such products may, for example, be provided with a functional insert in the form of an adhesive, sealant, or electrically semiconducting coating or liner or a quantity of solder in accordance with the process of the invention by welding together at least two super-imposed flaps of a single folded pre-stretched polymeric web after having been pre-coated lined or otherwise provided with a functional insert material.
  • the polymeric material may be deformed in any direction which will provide the desired direction of recovery in the final product which, espacially in the case of boots, transitions, sleeves, udders and end-caps, is preferably substantially only radially inward shrinkage in relation to the substrate to which they are applied, that is in the substantial absence of shrinkage longitudinally (e.g. less than 10% longitudinal shrinkage when fully radially recovered) in relation to said substrate.
  • shrinkage may be achieved by mono-axial deformation of the polymeric material.
  • the functional insert may comprise any material that is desired to be located internally of the hollow heat-recoverable article to perform any desired function.
  • One type of insert is fusible at or around the recovery temperature of the article, e.g. a hot-melt adhesive, or a solder insert, as described for example in UK Patent Nos. 1 062 043, 1 062 709, 1 062 870, 1 098 304 and 1 149125.
  • a second type of insert is a sealant, e.g. a highly viscous liquid, paste or gease, as described for example, in UK Patent Nos. 1 116 878 and 1 116 879.
  • a third type of insert is a barrier, e.g. a water barrier such as an aluminium foil liner.
  • a fourth type of insert is an electrical screen, for example, a liner in the form of an electrically conduction braid or foil.
  • the manner in which the functional insert is disposed on the deformed polymeric material will naturally depend on the type of insert employed.
  • the insert is an adhesive or sealant coating
  • the coating may be applied to the whole of the deformed polymeric material and the adhesive or sealant in the regions to be fused together displaced, e.g. by local heating and application off pressure.
  • Any cross-linkable polymeric material to which the property of dimensional recoverability may be imparted such as those disclosed in U.K. Specification No. 990 235 may be used to form the articles.
  • Polymers which may be used in the polymeric material include polyolefins such as polyethylene and polypropylene, and ethylene copolymers, for example with propylene, butene, hexene, octene, vinyl acetate or other vinyl esters or methyl or ethyl acrylate, polyamides, polyurethanes, polyvinyl chloride, polyvinylidine fluoride, or other fluorinated polymers or copolymers, e.g.
  • Tefzel (trade name - commercially available from Dupont), elastomeric materials such as those disclosed in UK specification No. 1 010 064 and blends such as those disclosed in UK specification Nos. 1 284 082 and 1 294 665.
  • the polymeric materials can be tailored to suit the intended use by the addition of fillers, e.g. semiconducting fillers or anti-tracking agents, flame retardants, plasticisers, pigments, stabilisers and lubricants, or where necessary, e.g. where the polymeric material is substantially non-crystalline, a hold-out agent such as a thermoplastic polymer, e.g. polyethylene, may be included in the material.
  • the polymeric material may be cross-linked by irradiation, for example, by means of an electron beam of by y-radiation or it may be chemically cross-linked. Whichever cross-linking process is used, it may be advantageous to incorporate one or more co-curing agents for example polyunsaturated monomers such as triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetramethacrylate, allyl methacrylate and vinyl methacrylate.
  • co-curing agents for example polyunsaturated monomers such as triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetramethacrylate, allyl methacrylate and vinyl methacrylate.
  • One method of chemical cross-linking that may be used in the process according to the invention involves grafting and unsaturated hydrolysable silane on the polymer and subjecting the article to moisture during a curing stage, for example, as described in UK Patent specification Nos. 1 286460 and 1 357 549.
  • any of the techniques conventionally employed for fusing together polymeric materials may be employed in the process of the present invention, e.g. radio frequency, ultrasonic or hot bar welding, and pressure may additionally be applied to ensure a satisfactory bond.
  • pressure may additionally be applied to ensure a satisfactory bond.
  • a heating/cutting device such as a hot wire cutter or a laser beam, if necessary in association with pressure applying means such as a roller.
  • the process is particularly appropriate in the production of hollow heat-recoverable articles for use in the electrical field, e.g. boots, transitions, sleeves, udders and end-caps.
  • such products are characterised by a wall thickness before heat-recovery thereof of preferably from 0.1 to 5 mm, especially from 0.5 to 3 mm e.g. 1 to 3 mm.
  • a pair of polyethylene sheets 1 which have been expanded longitudinally to 3 times their original length at a temperature of 100 °C, coated with a hot-melt adhesive which is insensitive to the subsequent irradiation treatment (see below) and cooled whilst in the expanded condition, are superimposed one on the other and welded at positions 2 transversely of the tube through the hot-melt adhesive.
  • the regions of the sheets at positions 2 to be welded together are locally preheated and pressed together by suitably located heated rollers causing the adhesive to be displaced from the region to be welded to produce seams 3..
  • the welded sheets are then irradiated in an electron beam at a dosage of 15 Mrads causing cross-linking of the polyethylene.
  • the assembly is severed along the weld seams 3 employing a mechanical cutter to produce a plurality of heat-recoverable electrical udders 4 each having two legs 5 defined by the welds 3.
  • the areas depicted by reference numeral 6 are discarded.
  • Such udders may be employed in the electrical termination of a cable comprising two primary wires by heat recovering the udder about the end of the cable, the primary wires passing through the legs of the udder.
  • electrical boots 12 are produced from non-crocc-linked radially expanded polyethylene tubing (produced as described in the preceding embodiment), the boots being profiled by welding to produce welded seams 3 and severing along the weld seams 3 to separate the boots from the superfluous regions.
  • the profiled tube is then subjected to electron irradiation as hereinbefore described and subsequently severed transversely to produce the individual boots as shown in Figure 9.
  • an alternative method of producing the boots of Figure 9 is illustrated.
  • a sheet of non-cross-linked non-expanded polyethylene 1 is heated to a temperature of 100° and passed over a series of vacuum moulds. After application of vacuum, the sheet is impressed with a plurality of expanded areas 13 corresponding in shape to one half of the boot to be produced. The interior of the boot half is then coated with a hot-melt adhesive and after cooling, the sheet is removed from the mould and superimposed on a similarly processed sheet of complimentary form such that the half-boots of one sheet are in register with the half-boots of the other.
  • Each complimentary and registering pair of half-boots are thereafter welded together and the whole boots so formed are separated from the surrounding area by severing along the welds and also across the ends to produce the transitions in their final form (not shown).
  • the articles so formed are thereafter irradiated in an electron beam as hereinbefore described.
  • a heat-recoverable solder containing flat cable connector analogous to that described in UK Patent 1 334 556 is produced from two substantially non-cross-linked polyethylene sheets 18 and 19 which have been deformed by stretching to 3 times their original length and then corrugated by thermoforming at this temperature with subsequent rapid cooling.
  • each channel 20 so defined in one sheet 18 is placed a ring of pre- fluxed solder maintained in position by a small quantity of pressure sensitive adhesive (not shown) and thereafter the other sheet 19 is superimposed on the lower sheet such that the peaks 16 of the corrugation of one sheet are in register with those of the other sheet to define a series of parallel interlinked solder containing sleeves 21.
  • the sheets 18 and 19 are then welded together along the contacting peaks 16 employing an ultrasonic welding tool to produce the assembly in Figure 12.
  • the solder rings are not provided, the channels 20 being coated with a hot-melt adhesive.
  • the sleeves may be separated one from another by severing along the weld seams employing a conventional cutting tool.
  • the wall thickness of the polyethylene after deformation may be 0,1 mm 0,5 mm, 1.0 mm, 1,5 mm, 2,0 mm, 2,5 mm, 3,0 mm, 3,5 mm, 4,0 mm, 4,5 mm and 5,0 mm with similar results.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Claims (26)

1. Verfahren zur Herstellung eines hohlen wärmeschrumpfbaren Artikels mit einer Funktionseinlage, das umfasst
a) Verformen von mindestens einem Abschnitt eines Hauptteils eines schmelzverschweissbaren Polymermaterials bei einer unterhalb des Erweichungspunktes des Materials liegenden Temperatur, um es wärmeschrumpfbar zu machen,
b) Inkontaktbringen der Funktionseinlage mit einem freiliegenden Abschnitt des Hauptteils,
c) Verbinden von mindestens einem Abschnitt des Hauptteils mit einem Substrat von schmelzverschweissbarem Polymermaterial, um die Gestalt von mindestens einem hohlen wärmeschrumpfbaren Artikel mit darin befindlicher Funktionseinlage herzustellen, und
d) Vernetzen der die Verbindung bildenden Abschnitte des verformten Hauptteils und des Substrats miteinander.
2. Verfahren nach Anspruch 1, wobei der Hauptteil verformt und verschweisst wird, um mindestens einen rohrförmigen Artikel herzustellen, der schrumpfbar im wesentlichen nur in radialer Richtung bezüglich seiner Rohrachse ist.
3. Verfahren nach Anspruch 1 oder 2, wobei das wärmeschrumpfbare Material mindestens 0,1 mm stark ist.
4. Verfahren nach einem der Ansprüche 1 bis 3, wobei das Verbinden durch Schmelzen des Polymermaterials herbeigeführt wird.
5. Verfahren nach einem der Ansprüche 1 bis 4, wobei das das Verbinden herbeiführende Material weiteres Material zusätzlich zu dem Hauptteil und dem Substrat einschliesst und beim Vernetzen das weitere Material mit demjenigen des Hauptteils und des Substrats vernetzt wird.
6. Verfahren nach einem der vorhergehenden Ansprüche, wobei beim Vernetzen praktisch das gesamte Polymermaterial zusätzlich zu dem das Verbinden herbeiführenden Material vernetzt wird.
7. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Vernetzen nach der Verformungsphase und der Verbindungsphase vorgenommen wird.
8. Verfahren nach einem der Ansprüche 1 bis 6, wobei das Vernetzen nach der Verformungsphase und während der Verbindungsphase vorgenommen wird.
9. Verfahren nach einem der Ansprüche 1 bis 7, wobei das Verbinden nach der Verformungsphase vorgenommen wird.
10. Verfahren nach einem der vorhergehenden Ansprüche, wobei das schmelzverschweissbare Polymermaterial vor der Vernetzungsphase einen Gel-Gehalt von weniger als 5% aufweist, gemessen nach der Prüfmethode ANSI/ASTM D2765-68.
11. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Substrat, mit dem ein Abschnitt des Hauptteils verschweisst wird, einen anderen Abschnitt dieses Hauptteils darstellt.
12. Verfahren nach Anspruch 11, wobei der Hauptteil bahnförmig ist und die Bahn in der Verformungsphase in Längsrichtung gedehnt wird.
13. Verfahren nach einem der Ansprüche 1 bis 10, wobei das Substrat, mit dem ein Abschnitt des Hauptteils verbunden wird, zunächst getrennt von dem Hauptteil vorliegt.
14. Verfahren nach Anspruch 13, wobei der Hauptteil bahnförmig ist und das Substrat bahnförmig ist.
15. Verfahren nach Anspruch 14, wobei der Hauptteil in der Verformungsphase in Längsrichtung gedehnt wird und das Substrat in entsprechender Weise gedehnt wird.
16. Verfahren nach einem der Ansprüche 1 bis 15, wobei in der Verformungsphase mindestens ein Bereich des Hauptteils verformt wird, das Substrat in mindestens einem Bereich bei einer unter dem Erweichungspunkt des Materials liegenden Temperatur örtlich verformt wird, um es wärmeschrumpfbar zu machen, und der Hauptteil und das Substrat mit ihren jeweiligen verformten Bereichen in gegenseitigem Zusammenwirken verbunden werden, um den (die) Artikel herzustellen.
17. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Funktionseinlage einen Kleber, eine Abdichtung, eine leitende oder halbleitende Verbindung oder ein Quantum Lot umfasst.
18. Wärmeschrumpfbarer Artikel, versehen mit einer Funktionseinlage, umfassend einen Hauptteil aus Polymermaterial, der bei einer unterhalb des Erweichungspunkts des Materials liegenden Temperatur verformt worden ist, um das Material wärmeschrumpfbar zu machen, wobei mindestens ein Abschnitt des Hauptteils mit einem Substrat aus Polymermaterial verbunden ist, um den Artikel mit der darin befindlichen Funktionseinlage herzustellen, und die die Verbindung herstellenden Abschnitte des Hauptteils und des Substrats miteinander vernetzt sind.
19. Wärmeschrumpfbarer Artikel nach Anspruch 18, der eine hohle Rohrform besitzt und im wesentlichen nur in radialer Richtung bezüglich seiner Rohrachse wärmeschrumpfbar ist.
20. Artikel nach Anspruch 18 oder 19, wobei der Hauptteil und das Substrat miteinander oder mit weiterem Material schmelzverschweisst sind, das mit dem Material des Hauptteils und des Substrats vernetzt ist.
21. Artikel nach einem der Ansprüche 18 bis 20, bei dem im wesentlichen das gesamte Polymermaterial vernetzt ist.
22. Artikel nach einem der Ansprüche 18 bis 21, wobei das Substrat, mit dem ein Abschnitt des Hauptteils verbunden ist, ein weiterer Abschnitt des Hauptteils ist.
23. Artikel nach einem der Ansprüche 18 bis 21, wobei das Substrat, mit dem ein Abschnitt des Hauptteils verbunden ist, getrennt von dem Hauptteil vorliegt.
24. Artikel nach einem der Ansprüche 18 bis 23, wobei der Hauptteil und das Substrat jeweils örtlich in mindestens einem Bereich bei einer unter der Erweichungstemperatur des Materials liegenden Temperatur verformt sind, um das Material wärmeschrumpfbar zu machen, und mit ihren jeweiligen verformten, miteinander zusammenwirkenden Bereichen miteinander verbunden sind, um mindestens einen hohlen Artikel zu bilden.
25. Artikel nach einem der Ansprüche 18 bis 24, wobei die Funktionseinalge einen Kleber, eine Abdichtung, eine leitende oder halbleitende Verbindung oder ein Quantum Lot umfasst.
26. Artikel nach einem der Ansprüche 18 bis 25, wobei das Polymermaterial im verformten Zustand eine Dicke zwischen 0,1 und 5,0 mm hat.
EP81303442A 1980-07-28 1981-07-27 Wärmeschrumpfbarer Artikel und Verfahren zu dessen Herstellung Expired EP0045212B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81303442T ATE7184T1 (de) 1980-07-28 1981-07-27 Waermeschrumpfbarer artikel und verfahren zu dessen herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8024622 1980-07-28
GB8024622 1980-07-28

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EP0045212A2 EP0045212A2 (de) 1982-02-03
EP0045212A3 EP0045212A3 (en) 1982-02-10
EP0045212B1 true EP0045212B1 (de) 1984-04-18

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EP (1) EP0045212B1 (de)
JP (1) JPS5763226A (de)
AT (1) ATE7184T1 (de)
CA (1) CA1170418A (de)
DE (1) DE3163208D1 (de)
GB (1) GB2084505B (de)

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JPS568435B2 (de) * 1972-09-19 1981-02-24
GB1454838A (en) * 1973-05-10 1976-11-03 Sumitomo Electric Industries Heat-shrinkable tubing
FI64482C (fi) * 1974-09-27 1983-11-10 Raychem Corp Vaermeaoterhaemtbar anordning och anordning av densamma foer en kabelskarv
BR7708360A (pt) * 1976-12-15 1978-07-25 Raychem Corp Processo para proteger um substrato e para formacao de uma cobertura vedante,grampo e conjunto de grampos
US4123047A (en) * 1976-12-15 1978-10-31 Raychem Corporation Modular clip assembly for heat shrinkable material
GB2025157A (en) * 1978-03-01 1980-01-16 Raychem Pontoise Sa Heat-recoverable articles
US4300284A (en) * 1978-12-15 1981-11-17 Raychem Corporation Method and apparatus to organize and to electrically connect wires
JPS5731064Y2 (de) * 1979-06-28 1982-07-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020131241A1 (en) * 2018-12-20 2020-06-25 Milliken & Company Multiple chamber innerduct structure

Also Published As

Publication number Publication date
DE3163208D1 (en) 1984-05-24
GB2084505B (en) 1984-05-10
ATE7184T1 (de) 1984-05-15
JPS5763226A (en) 1982-04-16
JPH0318575B2 (de) 1991-03-12
GB2084505A (en) 1982-04-15
EP0045212A3 (en) 1982-02-10
CA1170418A (en) 1984-07-10
EP0045212A2 (de) 1982-02-03

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